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A kind of polyhydroxyethyl methacrylate modified phenolic foam and preparation method thereof

A polyhydroxyethyl methacrylate and phenolic foam technology, which is applied in the field of phenolic foam and its preparation, can solve the problems of low compressive performance, poor toughness, undesired thermal insulation materials, etc., and achieves the effects of improving toughness and compressive strength.

Active Publication Date: 2020-05-19
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, phenolic foam has some defects in mechanical properties, such as low compressibility, poor toughness, etc.
[0003] Chinese patent CN105802124A is a kind of toughened phenolic resin. The selected raw materials include formaldehyde, phenol, hexamethylenetetramine, methacrylic acid, melamine, and toughening agent 3-(4-oxo-3-(phenylamino)- 4,5-dihydro-1H-pyrazolo[4,3-c]pyridin-1-yl)tetrahydro-2H-pyran-4-carbonitrile, this scheme only greatly improves the toughness of phenolic resin , but there is no improvement in compressive strength, which is not desirable for insulation materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1) Add 100g of phenol, 10g of polyhydroxyethyl methacrylate, and 3g of saturated sodium hydroxide solution into the reaction kettle, add 35g of solid paraformaldehyde in batches at a water bath temperature of 60°C, control the addition for half an hour, and continue the reaction for half an hour After one hour, raise the temperature to 90°C, continue the reaction for 70 minutes, and then keep the vacuum in the reaction device at 650MPa for vacuum distillation. During the distillation process, the temperature of the material is controlled at about 48°C, and the distillation is stopped until the amount of steamed water reaches a certain level. , adding acetic acid to adjust the pH value of the product to about 7 to obtain a phenolic base resin.

[0034] 2) Mix the phenolic base resin, Tween-80, n-pentane, and p-toluenesulfonic acid in a ratio of 100:12:10:12, stir quickly for 3 minutes, and then transfer the mixed material to the mold , react at 70°C for 10 minutes, demol...

Embodiment 2

[0036] 1) Add 100g of phenol, 15g of polyhydroxyethyl methacrylate, and 3g of saturated sodium hydroxide solution into the reaction kettle, add 35g of solid paraformaldehyde in batches at a water bath temperature of 60°C, control the addition for half an hour, and continue the reaction for half an hour After one hour, raise the temperature to 90°C, continue the reaction for 70 minutes, and then keep the vacuum in the reaction device at 650MPa for vacuum distillation. During the distillation process, the temperature of the material is controlled at about 48°C, and the distillation is stopped until the amount of steamed water reaches a certain level. , adding acetic acid to adjust the pH value of the product to about 7 to obtain a phenolic base resin.

[0037] 2) Mix the phenolic base resin, Tween-80, n-pentane, and p-toluenesulfonic acid in a ratio of 100:12:10:12, stir quickly for 3 minutes, and then transfer the mixed material to the mold , react at 70°C for 10 minutes, demol...

Embodiment 3

[0039] 1) Add 100g of phenol, 20g of polyhydroxyethyl methacrylate, and 3g of saturated sodium hydroxide solution into the reaction kettle, add 35g of solid paraformaldehyde in batches at a water bath temperature of 60°C, control the addition for half an hour, and continue the reaction for half an hour After one hour, raise the temperature to 90°C, continue the reaction for 70 minutes, and then keep the vacuum in the reaction device at 650MPa for vacuum distillation. During the distillation process, the temperature of the material is controlled at about 48°C, and the distillation is stopped until the amount of steamed water reaches a certain level. , adding acetic acid to adjust the pH value of the product to about 7 to obtain a phenolic base resin.

[0040] 2) Mix the phenolic base resin, Tween-80, n-pentane, and p-toluenesulfonic acid in a ratio of 100:12:10:12, stir quickly for 3 minutes, and then transfer the mixed material to the mold , react at 70°C for 10 minutes, demol...

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Abstract

A polyhydroxyethyl methacrylate modified phenolic foam and a preparation method thereof, relating to a phenolic foam and a preparation method thereof, the present invention relates to a polyhydroxyethyl methacrylate modified phenolic foam, the modified phenolic resin The raw materials of the method are phenol, sodium hydroxide, solid paraformaldehyde and polyhydroxyethyl methacrylate; surfactants, foaming agents and curing agents are used in the foaming stage, wherein the surfactant is Tween-80; Foaming agent is n-pentane; Curing agent is p-toluenesulfonic acid; Adopt the product prepared by the present invention, mainly utilize the hydroxyl group that polyhydroxyethyl methacrylate has and the methylol group generation etherification reaction of phenolic resin to generate ether bond, Furthermore, a graft copolymer with longer side groups is formed by ether bonds, which greatly improves the toughness of the material while maintaining good flame retardancy, and at the same time the compressive strength is also significantly improved, which is suitable for demanding External wall insulation construction.

Description

technical field [0001] The invention relates to a phenolic foam and a preparation method thereof, in particular to a polyhydroxyethyl methacrylate modified phenolic foam and a preparation method thereof. Background technique [0002] Phenolic foam is a new type of fire-resistant, fire-resistant and low-smoke thermal insulation material. It is a closed-cell rigid foam made of phenolic resin with flame retardant, smoke suppressant, foaming agent, curing agent and other additives. As a thermal insulation material, phenolic foam can meet the requirements of heat insulation and fire prevention at the same time. It is used as a material for sealing and controlling fire in public buildings, which can fundamentally eliminate dust and fine fiber pollution from organic flammable materials and inorganic materials. Double hazards to people's safety and health. However, phenolic foam has some defects in mechanical properties, such as low compressibility, poor toughness and so on. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G81/02C08J9/14C08L87/00
CPCC08G81/024C08J9/141C08J2203/14C08J2387/00
Inventor 葛铁军徐志华王佳王成城唐恺鸿
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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